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    <meta charset="UTF-8">
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    <title>Document</title>
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    <script>
//定义一个集合
let arrayLike = {
    '0': 'a',
    '1': 'b',
    '2': 'c',
    length: 3
}; 
//转成数组
let arr2 = Array.from(arrayLike); // ['a', 'b', 'c']

console.log(arr2)


    </script>
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